SYLVANIA DESIGNER | 22W T9 | 4100K Circline Fluorescent Lamp

The Sylvania 20401 (FC8T9/CW) is a 22-watt circular T9 fluorescent lamp designed for fixtures that require a compact, rounded light source. Part of the Designer series, this circline lamp provides 1,050 lumens of 4100K Cool White light, striking a perfect balance between functional brightness and a clean aesthetic. With an 8" nominal diameter and a standard G10q 4-pin base, it is a common choice for ceiling "cloud" fixtures, magnifying task lights, and circular kitchen luminaires. Featuring a high 80 CRI for accurate color rendering and a 12,000-hour rated life, this lamp offers long-lasting, high-quality performance for both residential and commercial spaces.

Performance Features

This Rapid Start circline lamp is engineered for smooth, flicker-free ignition when used with compatible ballasts. The unique circular geometry allows for 360-degree light distribution, making it ideal for overhead fixtures where even light spread is required. Its Cool White (4100K) phosphor is particularly effective in kitchens and bathrooms, providing a bright, clean light that helps with visibility for daily tasks. Additionally, the 80 CRI rating ensures that textures and colors in your environment appear vibrant and natural.

• Compact Circular Design: 8-inch diameter fits perfectly in specialized round fixtures.
• Superior Color Quality: High color rendering index for more natural-looking interiors.
• Efficient Operation: Rapid Start technology extends the life of the electrodes and ensures quick startup.
• Standardized Base: G10q 4-pin connection (4 pins arranged in a square) for widespread compatibility.

Technical Specifications

• Brand: Sylvania
• Product Code: 20401
• Ordering Abbreviation: FC8T9/CW
• Wattage: 22W
• Luminous Flux: 1,050 Lumens
• Color Temperature: 4100K (Cool White)
• Color Rendering Index (CRI): 80
• Average Rated Life: 12,000 Hours
• Base Type: G10q (4-Pin)
• Nominal Diameter: 8 inches (203.2 mm)
• Bulb Shape: T9 Circline

Installation Guidelines

• Ballast Requirement: Must be used with a 22W circline fluorescent ballast.
• Pin Alignment: Ensure the 4-pin connector is seated firmly into the socket for proper electrical contact.
• Note: Not suitable for use with standard linear fluorescent fixtures; specifically for circline-ready luminaires.